CN111558988A - Jet dry particle printing device capable of printing fine patterns - Google Patents

Abstract

The invention discloses an air-jet dry particle printing device capable of printing fine patterns, which comprises a blanking unit, an air supply unit and a conveying belt, wherein the blanking unit comprises a plurality of blanking boxes arranged above the conveying belt in parallel, two adjacent blanking boxes are attached to each other, the arrangement direction of the blanking boxes is vertical to the conveying direction of the conveying belt, a blanking hose is arranged at the center of the bottom of each blanking box and is communicated with the inside of the blanking box, and at least two blanking cavities are uniformly divided in the blanking box along the longitudinal direction through a partition plate. The jet dry particle printing device capable of printing the fine patterns realizes printing type positioning blanking dry particles, can form complex patterns with fine lines on a green brick, and has continuous position points for printing the dry particles, continuous printed pattern lines and high resolution.

Description

Jet dry particle printing device capable of printing fine patterns

Technical Field

The invention relates to the technical field of ceramic production, in particular to an air-jet dry particle printing device capable of printing fine patterns.

Background

In recent years, with the promotion of the accelerated development of urbanization and the high-end development of decoration and finishing requirements, the yield of ceramic tiles serving as wall and floor decoration materials is gradually increased. At present, the functions of ceramic tiles are developed towards diversification, the decoration effect of the ceramic tiles is more and more valued by consumers, and the ceramic tiles with single texture cannot meet the requirement of the consumers on personalized decoration. At present, screen printing and roller printing technologies are used for improving the decoration effect of ceramic tiles, dry particles are used for surface decoration of the ceramic tiles in order to improve the stereoscopic impression of the decoration effect, the fineness of patterns obtained by the current dry particle material distribution system is low, the material distribution accuracy is poor, and the definition and the stereoscopic effect of texture patterns are seriously influenced.

Disclosure of Invention

The invention aims to provide an air-jet dry particle printing device capable of printing fine patterns, which realizes printing type positioning blanking dry particles, can form complex patterns with fine lines on a green brick, and has continuous position points of the printed dry particles, continuous printed pattern lines and high resolution.

In order to achieve the purpose, the invention adopts the following technical scheme:

the jet type dry particle printing device capable of printing fine patterns comprises a blanking unit, an air supply unit and a conveying belt, wherein the blanking unit comprises a plurality of blanking boxes arranged above the conveying belt in parallel, two adjacent blanking boxes are attached to each other, the arrangement direction of the blanking boxes is perpendicular to the conveying direction of the conveying belt, a blanking hose is arranged at the center of the bottom of each blanking box and is communicated with the inside of each blanking box, the inside of each blanking box is uniformly divided into at least two blanking cavities by a partition plate along the longitudinal direction, and each blanking cavity is communicated with the blanking hose;

an installation rack is arranged between the blanking unit and the conveying belt, the blanking ends of the blanking hoses are installed on the installation rack, the blanking hoses of all the blanking boxes are installed on the installation rack side by side, two adjacent blanking hoses are tightly attached to each other, and the arrangement direction of the blanking hoses is perpendicular to the conveying direction of the conveying belt;

the air feed unit includes air supply unit and air inlet line, air supply unit to air inlet line carries compressed air, air inlet line is responsible for and many and the air inlet branch who admits air and be responsible for the intercommunication including admitting air the air inlet branch is equipped with the on-off control valve, each of blanking box each the unloading chamber through the air inlet branch with the intercommunication is responsible for in the air inlet, air inlet branch inserts for mouth of pipe slant ground the inner wall of blanking box.

Preferably, each air inlet branch pipe is further provided with a pressure regulating valve, and an air inlet of the pressure regulating valve is communicated with an air outlet of the switch control valve.

Preferably, the discharging end of the discharging hose is connected with a discharging pipe, the discharging pipe is mounted on the mounting rack and made of a hard material, and a discharging port of the discharging pipe is cut into an oblique notch;

the diameter of the blanking hose is 2-4 mm.

Preferably, the automatic feeding device further comprises a pre-feeding belt, wherein the pre-feeding belt is arranged between the feeding unit and the conveying belt, the conveying direction of the pre-feeding belt is the same as the conveying direction of the conveying belt, and the conveying speed of the pre-feeding belt is the same as the conveying speed of the conveying belt.

Preferably, the conveying speed of the conveying belt is 20-50 m/min, the air pressure of compressed air conveyed by the air source device is 0.2-0.8 Mpa, the air flow speed is 3-20 m/s, and the distance from the pipe orifice of the air inlet branch pipe to the bottom of the blanking box is 1-3 cm.

Preferably, the mounting rack is provided with a guide rail perpendicular to the conveying direction of the conveying belt, the blanking end of the blanking hose is slidably mounted on the guide rail through a sleeved guide wheel, and the guide wheel is provided with a locking assembly.

Preferably, the inner wall of the blanking box is uniformly provided with a plurality of longitudinal clamping grooves, two ends of each clamping groove extend to the upper end and the lower end of the blanking box, the side edges of the partition plates are inserted into the corresponding clamping grooves, and air inlets used for being communicated with the air inlet branch pipes are formed between every two adjacent clamping grooves.

Preferably, the baffle includes mainboard and subplate, the middle part of subplate is equipped with the installation slot, the installation slot to the bottom of subplate extends, the notch of installation slot is seted up in the bottom of subplate, the side border of mainboard with the side border of subplate all inserts correspondingly in the draw-in groove, the subplate passes through the installation slot with the mainboard joint, the cell wall of installation slot with the mainboard pastes.

Preferably, the blanking box is provided with a sealing plug for sealing the air inlet, the air inlet communicated with the air inlet branch pipe in each blanking cavity of the blanking box opens the corresponding sealing plug, and the rest air inlets are sealed by the corresponding sealing plugs.

Preferably, the gas supply unit further comprises a processing device, the processing device is arranged between the gas source device and the gas inlet pipeline, and the processing device comprises one or more of an oil remover for removing oil from gas, a dryer for drying gas and a pressure stabilizer for stabilizing pressure of gas.

Compared with the prior art, the invention has the following beneficial effects:

the jet dry particle printing device capable of printing fine patterns is used for printing dry particles on green bricks, the conveying belt is used for conveying the green bricks, and the plurality of blanking boxes are arranged right above the conveying belt in parallel to print the dry particles on the green bricks. Each blanking box is uniformly divided into a plurality of blanking cavities through a partition plate, and the same or incompletely same dry particles can be put into each blanking cavity according to production requirements; each blanking cavity is inserted with an air inlet branch pipe, and when the air inlet branch pipes spray air, dry particles of the corresponding blanking cavities are sprayed out from the blanking pipes under the driving of air flow and fall on green bricks of the conveying belt; each air inlet branch pipe is provided with a switch control valve, so that whether each blanking box is blanked or not can be controlled (namely, which position point is controlled to be blanked) and which blanking cavity is blanked (namely, which type of dry particle is controlled to be blanked), the air inlet branch pipes corresponding to the areas of the green bricks needing blanking dry particles are driven to jet air only in the plurality of blanking boxes which are arranged side by side during working, the blanking boxes corresponding to the areas without blanking dry particles do not jet air, the working process is similar to ink-jet printing, and therefore printing type positioning blanking dry particles are achieved, complex patterns with fine lines can be formed on the green bricks, the efficiency of dry particle positioning blanking and the blanking accuracy are effectively improved, the control is easy, and the equipment is simple; different from a plurality of blanking units which are arranged in the front and back direction along the conveying direction of the green bricks, a plurality of dry particle printing stations are not required to be arranged, and the green bricks can pass through one dry particle printing station, so that the production speed of the ceramic tiles is improved.

In addition, the unloading box adopts the unloading hose to can overcome the influence of gap between the unloading box to printing continuity, all the unloading end of the unloading hose of unloading box can hug closely each other side by side on the installation frame, thereby the position point of printable dry grain is continuous, rather than discrete, improves the fineness that dry grain printed widely, and the pattern lines of printing out can be continuous, and the resolution ratio is high, and the thickness of lines is steerable below 5 mm. And because the dry particles are not easy to agglomerate and dry and are not sticky, the dry particles are not accumulated in a bent blanking hose and can be completely output along with the air flow.

Drawings

The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.

FIG. 1 is a left side view of an air jet dry particle printing apparatus according to one embodiment of the present invention;

FIG. 2 is a front view of an air jet dry particle printing apparatus according to one embodiment of the present invention;

FIG. 3 is a view of the inside of the blanking box according to one embodiment of the present invention;

FIG. 4 is a top view of the interior of the blanking box according to one embodiment of the present invention;

FIG. 5 is another top view structural diagram of the interior of the blanking box according to one embodiment of the present invention;

FIG. 6 is a construction of a subplate according to one embodiment of the invention;

fig. 7 is a diagram of a pre-blanking belt structure according to one embodiment of the present invention.

Wherein: a blanking box 1; a blanking hose 11; a chamfered notch 111; a discharge pipe 112; a separator 12; a blanking chamber 13; a main board 121; the sub-plate 122; a mounting slot 123; a card slot 14; an air inlet 15; a pre-blanking belt 16; a gas source device 2; an air intake line 3; a main intake pipe 31; an intake branch pipe 32; the on-off control valve 34; a pressure regulating valve 33; a conveyor belt 4; a frame 5 is installed.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 to 6, an air-jet dry particle printing device capable of printing fine patterns comprises a blanking unit, an air supply unit and a conveyor belt 4, wherein the blanking unit comprises a plurality of blanking boxes 1 arranged above the conveyor belt 4 in parallel, two adjacent blanking boxes 1 are attached to each other, the arrangement direction of the blanking boxes 1 is perpendicular to the conveying direction of the conveyor belt 4, a blanking hose 11 is arranged at the center of the bottom of each blanking box 1, the blanking hose 11 is communicated with the inside of the blanking box 1, the inside of each blanking box 1 is uniformly divided into at least two blanking cavities 13 by a partition plate 12 along the longitudinal direction, and each blanking cavity 13 is communicated with the blanking hose 11;

an installation rack 5 is arranged between the blanking unit and the conveying belt 4, the blanking ends of the blanking hoses 11 are installed on the installation rack 5, the blanking hoses 11 of all the blanking boxes 1 are installed on the installation rack 5 side by side, two adjacent blanking hoses 11 are tightly attached to each other, and the arrangement direction of the blanking hoses 11 is vertical to the conveying direction of the conveying belt 4;

the air feed unit includes air supply unit 2 and air inlet pipeline 3, air supply unit 2 to air inlet pipeline 3 carries compressed air, air inlet pipeline 3 is responsible for 31 and many and the air inlet branch 32 of 31 intercommunications of air inlet main pipe including the air inlet, each air inlet branch 32 is equipped with on-off control valve 34, each of blanking box 1 each blanking chamber 13 through air inlet branch 32 with the air inlet is responsible for 31 intercommunications, air inlet branch 32 inserts for mouth of pipe slant ground blanking box 1's inner wall.

The jet dry particle printing device capable of printing fine patterns is used for printing dry particles on green bricks, the conveying belt 4 is used for conveying the green bricks, and the plurality of discharging boxes 1 are arranged right above the conveying belt 4 in parallel to print the dry particles on the green bricks. Each blanking box 1 is uniformly divided into a plurality of blanking cavities 13 through partition plates 12, and the same or incompletely same dry particles can be put into each blanking cavity 13 according to production requirements; each blanking cavity 13 is inserted with an air inlet branch pipe 32, and when the air inlet branch pipe 32 injects air, dry particles of the corresponding blanking cavity 13 are ejected from the blanking pipe 11 under the driving of air flow and fall on green bricks of the conveying belt 4; each air inlet branch pipe 32 is provided with a switch control valve 34, so that whether each blanking box 1 is blanked (namely, which position point is controlled to be blanked) and which blanking box 1 to be blanked is which blanking cavity 13 is blanked (namely, what type of dry particle is controlled to be blanked), the corresponding air inlet branch pipe 32 is started to eject air only in the area of the blanking dry particle on the green brick in a plurality of blanking boxes 1 which are arranged side by side during working, the blanking box 1 corresponding to the area of the blanking dry particle is not ejected, the working process is similar to inkjet printing, and thus printing type positioning blanking dry particles are realized, a complex pattern with fine lines can be formed on the green brick, the efficiency of positioning blanking of the dry particles and the blanking accuracy are effectively improved, the control is easy, and the equipment is simple; different from a plurality of blanking units which are arranged in the front and back direction along the conveying direction of the green bricks, a plurality of dry particle printing stations are not required to be arranged, and the green bricks can pass through one dry particle printing station, so that the production speed of the ceramic tiles is improved.

The lower material box 1 adopts the blanking hose 11, thereby can overcome the influence of gap between the lower material box 1 to printing continuity, all the blanking end of the blanking hose 11 of the lower material box 1 can be hugged closely each other and arranged on the installation frame 5 side by side, thereby the position point of printable dry granules is continuous, rather than discrete, improves the fineness that the dry granules printed widely, and the pattern lines printed out can be continuous, and the resolution ratio is high, and the thickness of lines can be controlled below 5 mm. And because the dry particles are not easy to agglomerate and dry and are not sticky, the dry particles are not accumulated in the bent blanking hose 11 and can be completely output along with the air flow.

Preferably, each of the air inlet branch pipes 32 is further provided with a pressure regulating valve 33, and an air inlet of the pressure regulating valve 33 is communicated with an air outlet of the on-off control valve 34.

Because the bending degrees of the blanking hoses 11 of each blanking box 1 are not completely the same, the consistency of blanking time can be affected, and further the blanking position of dry granules deviates, and the larger the air pressure is, the larger the flow rate of the compressed air is, the larger the blanking speed of the dry granules stored in the blanking cavity 13 of the blanking box 451 under the action of the air flow of the air inlet branch pipe 32 is, so that the air pressure of the corresponding air inlet branch pipe 32 can be adjusted through the pressure adjusting valve 33, so that all blanking boxes 1 can synchronously blank, and the accuracy of dry granule positioning printing is improved.

Preferably, the discharging pipe 112 is connected to the discharging end of the discharging hose 11, the discharging pipe 112 is mounted on the mounting frame 5, the discharging pipe 112 is made of a hard material, and the discharging port of the discharging pipe 112 is cut into an oblique notch 111;

the diameter of the blanking hose 11 is 2-4 mm.

The discharging pipe 112 made of hard materials can be additionally arranged at the discharging end of the discharging hose 11, so that the service life can be prolonged, and the discharging pipe 112 made of hard materials is more stable and cannot shake when air flow is output.

The discharging pipe 112 releases part of air pressure in advance through the inclined notch 111, so that the pressure of compressed air output from the discharging hose 11 is greatly reduced, dry particle discharging is guided to a preset position, and meanwhile, the phenomenon that dry particles splash or green bricks are damaged due to overlarge air pressure during discharging is avoided. Since there may be very few dry pellets that may fall obliquely downward during pressure relief, rather than vertically, the opening of the oblique cut 111 is preferably oriented in the conveying direction of the conveyor belt 4 to avoid that the obliquely falling dry pellets spill over areas where no dry pellet printing is started, and to reduce the effect of these obliquely falling dry pellets on the printed image.

The maximum particle size of the dry particles is about 1mm, the diameter of the discharging pipe 11 is 2-4 mm, and therefore when the dry particles enter the discharging hose 11 in the discharging cavity 13, due to friction among the dry particles, discharging is difficult simply by gravity, and the dry particles cannot be discharged to the discharging hose 11 from the discharging cavity 13 when air is not sprayed; moreover, all the blanking cavities 13 of the blanking box 1 are converged to the same blanking hose 11 for blanking, and one of the blanking cavities 13 is pushed by compressed air to carry out blanking, so that the pressure of the compressed air can be applied to operate on different air inlet branch pipes 32 to achieve the purpose of virtual switching, namely one of the blanking cavities 13 of the blanking box 1 is kept for blanking forever, and meanwhile, the air flow entering the blanking hose 11 downwards generates an acting force for blocking dry particles from sliding downwards on the other blanking cavities 13, so that the situation that no dry particle is required to be distributed is finally ensured to avoid dry particle blanking.

Preferably, as shown in fig. 7, the blanking device further includes a pre-blanking belt 16, the pre-blanking belt 16 is disposed between the blanking unit and the conveying belt 4, a conveying direction of the pre-blanking belt 16 is the same as a conveying direction of the conveying belt 4, and a conveying speed of the pre-blanking belt 16 is the same as a conveying speed of the conveying belt 4.

By arranging the pre-blanking belt 16, the blanking unit can print a designed pattern to the pre-blanking belt 16 in advance, and the pre-blanking belt 16 is still; when the ceramic green bricks are conveyed to the position below the pre-blanking belt 16 through the conveying belt 4, the pre-blanking belt 16 is started to transfer the dry grain patterns printed in advance to the surfaces of the ceramic green brick bricks, so that the dry grain printing efficiency is greatly improved. The conveying direction of the pre-blanking belt 16 is the same as that of the conveying belt 4, and the conveying speed of the pre-blanking belt 16 is the same as that of the conveying belt 4, so that the pattern dry grains are transferred to the surface of the ceramic green brick at the same speed.

Preferably, the conveying speed of the conveying belt 4 is 20-50 m/min, the air pressure of the compressed air conveyed by the air source device 2 is 0.2-0.8 Mpa, the air flow speed is 3-20 m/s, and the distance from the pipe orifice of the air inlet branch pipe 32 to the bottom of the blanking box 1 is 1-3 cm.

The conveying speed (namely the green brick moving speed) of the conveying belt 4 and the air flow speed (namely the blanking speed) of the compressed air are matched with each other, so that dry granules can be continuously printed on green bricks along the conveying direction of the conveying belt 4, and the phenomena of vacancy and the like are avoided.

When the pressure and the flow rate of the compressed air delivered by the air source device 2 are higher, the flow rate of the compressed air is higher, the blanking speed of the dry granules stored in the blanking cavity 13 of the blanking box 1 under the action of the airflow of the air inlet branch pipe 32 is higher, the efficiency and the accuracy of the dry granule positioning blanking are effectively improved, and when the pressure and the flow rate of the compressed air delivered by the air source device 2 exceed a limited range, the dry granules are easy to splash after being sprayed out of the blanking pipe 11 under the action of larger airflow, so that the pattern effect of the dry granule positioning blanking is influenced;

the response speed of the switch control valve 34 is preferably 0.01s, the control of the dry particle discharging in the plurality of discharging boxes 1 can be quickly responded, and the accuracy of the dry particle positioning discharging is effectively improved.

The distance from the pipe opening of the air inlet branch pipe 32 to the bottom of the blanking box 1 is 1-3 cm, the distance is suitable, if the distance is smaller than the range, dry particles are easy to splash or damage green bricks, and if the distance is larger than the range, the dry particles are easy to deviate from the blanking position due to external factors.

Preferably, the mounting frame 5 is provided with a guide rail perpendicular to the conveying direction of the conveying belt 4, the blanking end of the blanking hose 11 is slidably mounted on the guide rail through a sleeved guide wheel, and the guide wheel is provided with a locking assembly.

The blanking end of each blanking hose 11 slides on a guide rail of the installation frame 5 through a guide wheel, so that the blanking position of each blanking hose 11 can be adjusted, the blanking hoses 11 are mutually attached, and the blanking hoses 11 can be arranged in groups and in regions according to the size and pattern distribution of green bricks, so that the flexibility and the universality of equipment are improved, and the dry grain printing device is suitable for dry grain printing of large-size green bricks.

Preferably, a plurality of longitudinal clamping grooves 14 are uniformly formed in the inner wall of the blanking box 1, two ends of each clamping groove 14 extend towards the upper end and the lower end of the blanking box 1, the side edges of the partition plates 12 are inserted into the corresponding clamping grooves 14, and an air inlet 15 communicated with an air inlet branch pipe 32 is formed between every two adjacent clamping grooves 14.

The inner wall of the blanking box 1 is uniformly provided with a plurality of longitudinal clamping grooves 14, so that the partition plates 12 are movably mounted, the number of the blanking cavities 13 can be controlled by controlling the mounting number and the mounting positions of the partition plates 12 according to production requirements, and the blanking box is more flexible and universal. The blanking box 1 is in a bucket shape.

Preferably, the partition board 12 includes a main board 121 and an auxiliary board 122, an installation slot 123 is arranged in the middle of the auxiliary board 122, the installation slot 123 extends to the bottom of the auxiliary board 122, a notch of the installation slot 123 is opened in the bottom of the auxiliary board 122, a side edge of the main board 121 and a side edge of the auxiliary board 122 are inserted into the corresponding slot 14, the auxiliary board 122 passes through the installation slot 123 and the main board 121, a slot wall of the installation slot 123 and the main board 121 are attached to each other.

Set up mainboard 121 and subplate 122 to constitute the baffle 12 of combination formula, it is more nimble than the baffle 12 of integral type, reduction equipment cost, subplate 122 passes through installation slot 123 with mainboard 121 joint, the installation is simple swift, is similar to building blocks concatenation.

Preferably, the mounting slot 123 of the sub-board 122 is wrapped with a sealing strip to improve the sealing property and prevent dry particles from leaking out from the gap between the main board 121 and the sub-board 122.

Preferably, the blanking box 1 is provided with a sealing plug for sealing the air inlet 15, the air inlet 15 in each blanking cavity 13 of the blanking box 1, which is communicated with the air inlet branch pipe 32, opens the corresponding sealing plug, and the rest of the air inlets 15 are sealed by the corresponding sealing plugs.

An air inlet 15 used for being communicated with the air inlet branch pipe 32 is arranged between two adjacent clamping grooves 14, so that a plurality of air inlets 15 are possibly arranged in one blanking cavity 13, but only one air inlet branch pipe 32 is needed, and therefore the rest air inlets 15 need to be sealed by sealing plugs.

Preferably, the gas supply unit further comprises a processing device, the processing device is arranged between the gas source device 2 and the gas inlet pipeline 3, and the processing device comprises one or more of an oil remover for removing oil from gas, a dryer for drying gas and a pressure stabilizer for stabilizing pressure of gas.

Carry out the preliminary treatment to compressed air through setting up processing apparatus, improve compressed air's quality, avoid influencing dry grain and print.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. The utility model provides a printable fine pattern's jet-propelled dry grain printing device, includes unloading unit, air feed unit and conveyer belt, the unloading unit includes a plurality of unloading boxes that set up side by side in the conveyer belt top, and two adjacent unloading boxes paste mutually, the array orientation of unloading box with the direction of delivery of conveyer belt is perpendicular, its characterized in that:

a blanking hose is arranged at the center of the bottom of the blanking box and is communicated with the interior of the blanking box, the interior of the blanking box is uniformly divided into at least two blanking cavities by a partition plate along the longitudinal direction, and each blanking cavity is communicated with the blanking hose;

an installation rack is arranged between the blanking unit and the conveying belt, the blanking ends of the blanking hoses are installed on the installation rack, the blanking hoses of all the blanking boxes are installed on the installation rack side by side, two adjacent blanking hoses are tightly attached to each other, and the arrangement direction of the blanking hoses is perpendicular to the conveying direction of the conveying belt;

the air feed unit includes air supply unit and air inlet line, air supply unit to air inlet line carries compressed air, air inlet line is responsible for and many and the air inlet branch pipe of being responsible for the intercommunication that admits air including admitting air, and each air inlet branch pipe is equipped with the on-off control valve, each of blanking box the unloading chamber through the air inlet branch pipe with the intercommunication is responsible for in admitting air, insert in the mouth of pipe slant of air inlet branch pipe the inner wall of blanking box.

2. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 1, wherein: each air inlet branch pipe is also provided with a pressure regulating valve, and an air inlet of the pressure regulating valve is communicated with an air outlet of the switch control valve.

3. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 1, wherein: the discharging end of the discharging hose is connected with a discharging pipe, the discharging pipe is arranged on the mounting rack and is made of a hard material, and a discharging port of the discharging pipe is cut into an oblique notch;

the diameter of the blanking hose is 2-4 mm.

4. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 1, wherein: still include the unloading belt in advance, the unloading belt in advance set up in the unloading unit with between the conveyer belt, just the direction of delivery of unloading belt in advance with the direction of delivery of conveyer belt is the same, the conveying speed of unloading belt in advance with the conveying speed of conveyer belt is the same.

5. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 1, wherein: the conveying speed of the conveying belt is 20-50 m/min, the air pressure of compressed air conveyed by the air source device is 0.2-0.8 Mpa, the air flow speed is 3-20 m/s, and the distance from the pipe orifice of the air inlet branch pipe to the bottom of the blanking box is 1-3 cm.

6. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 1, wherein: the installation rack is provided with a guide rail perpendicular to the conveying direction of the conveying belt, the blanking end of the blanking hose is slidably installed on the guide rail through a sleeved guide wheel, and the guide wheel is provided with a locking assembly.

7. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 1, wherein: the inner wall of the blanking box is uniformly provided with a plurality of longitudinal clamping grooves, two ends of each clamping groove extend to the upper end and the lower end of the blanking box, the side edges of the partition plates are inserted into the corresponding clamping grooves, and air inlets used for being communicated with the air inlet branch pipes are formed between every two adjacent clamping grooves.

8. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 7, wherein: the baffle includes mainboard and subplate, the middle part of subplate is equipped with the installation slot, the installation slot to the bottom of subplate extends, the notch of installation slot is seted up in the bottom of subplate, the side border of mainboard with the side border of subplate all inserts correspondingly in the draw-in groove, the subplate passes through the installation slot with the mainboard joint, the cell wall of installation slot with the mainboard pastes.

9. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 7, wherein: the blanking box is provided with sealing plugs for sealing the air inlets, the corresponding sealing plugs are opened at the air inlets communicated with the air inlet branch pipes in the blanking cavities of the blanking box, and the rest air inlets are sealed by the corresponding sealing plugs.

10. The air jet dry particle printing apparatus capable of printing fine patterns according to claim 1, wherein: the gas supply unit further comprises a processing device, the processing device is arranged between the gas source device and the gas inlet pipeline, and the processing device comprises one or more of an oil remover for removing oil from gas, a dryer for drying gas and a pressure stabilizer for stabilizing gas pressure.

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